QB,
I like 'em! This is a cool and clever way to get the crossover in. Reminds me of the Dr. Gas components. (
www.drgas.com). I'm a big fan of crossovers on 911 motors. Definitely knocks down the db level, and seems to particularly help midrange power. Have you experimented with secondary (distance from header to muffler inlet) length? I haven't done nearly enough testing, but it seems like the longer the better.
Thanks for sharing. Lemme know how it works out on the dyno.
Cheers, Chris